Acta Phys. -Chim. Sin. ›› 1996, Vol. 12 ›› Issue (05): 460-463.doi: 10.3866/PKU.WHXB19960515

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Preparation of Spherical Ultrafine Nickel Powder by Chemical Reduction in Aqueous Solution

Shen Yong,Zhang Zong-Tao,Zhao Bin,Zhu Yu-Zhen,Hu Li-Ming   

  1. National Engeneering and Research Center of Ultrafine Powder,Department of Chemistry,East China University of Science and Technology,Shanghai 200237
  • Received:1995-08-09 Revised:1995-11-20 Published:1996-05-15
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Abstract:

All kinds of spherical ultrafine nickel powders, varied in mean particle size (0.1-5μm),were prepared by chemical reduction in aqueous solution. The pH effect on the production of nickel powder and the main factors of their morphological control were studied. The nickel powder with purity 98.5% was obtained in the Na2CO3-NaHCO3 buffer system at pH 9.2-11. The surface-rubbed stirring oar helped to the preparation of nickel particles. The mean particle size was decreased to submicron range by using AgNO3 as nucleating agent. PVP was an efficient agent to regulate particle shape and reduce aggregation.

Key words: Ultrafine nickel powder preparation, Chemical reduction